Lipogenesis is common for organic molecules because the intermediate is formed in most nutrient metabolic processes. glycerol acetyl-coa pyruvate glucose

I think, Lipogenesis is a common for organic molecules because the intermediate Acetyl-CoA is formed in most metabolic processes. Lipogenesis involves the formation of fatty acids from Acetyl-CoA. Acetyl-CoA is an intermediate stage in metabolism of simple sugars, such as glucose, which is the preferred source of energy for most living organisms.  

Gay-lussac's law i think.